As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WHILE ENROUTE, THE CREW REPORTED THE YELLOW HYD SYSTEM SHUTDOWN DUE TO LOW PRESSURE DUE TO LOW HYD FLUID LEVEL. THE FLIGHT LANDED NORMALLY AND DID NOT REQUIRE A TOW INTO THE GATE NOR DID THEY DECLARE AN EMERGENCY FOUND CK VALVE LEAKING. ENG CASE DRAIN FILTER INSP C/O IAW AMM 29-13-43-401. NO DEBRIS FOUND. CK VALVE REPLACED AND LEAK CKD IAW AMM 29-11-36-400-001, CONS SERV. 1050GM CHECK VALVE IN PYLON, P/N 7312SD01 AND O-RING, PN NAS1612-16.